Ceiling structure with increased workability and space utilization and its construction method

ABSTRACT

The present invention relates to a functional ceiling coupling structure and its construction method. For this purpose, the ceiling coupling structure of the present invention includes a ceiling member; a fully threaded bolt, a top end of which is fixed to the ceiling member; and a carrying bar fixture coupled to a bottom end of the fully threaded bolt in order to accommodate a carrying bar. A height adjustable member having screw threads formed around an inner circumference of the height adjustable member is coupled to a lower part of the fully threaded bolt, and the carrying bar fixture is coupled to the height adjustable member, so as to adjust a relative height of the carrying bar fixture. As a result, the height of the carrying bar can be flexibly adjusted to thus achieve efficient construction of the ceiling structure.

TECHNICAL FIELD

The present invention relates to a ceiling structure with increased workability and space utilization, and its construction method, more particularly, to a ceiling structure wherein a carrying bar fixture is coupled on the bottom of a fully threaded bolt fixed to a ceiling structure in order to accommodate a carrying bar; a height adjustable member having a screw thread formed around an inner circumference thereof is coupled to a lower part of the fully threaded bolt; and the carrying bar is coupled to the height adjustable member to enable relative adjustment of height, so as to increase workability and space utilization, thereby ensuring favorable operation even in a narrow space, as well as its construction method.

BACKGROUND

A construction structure generally includes a slab formed in a horizontal direction except for a wall body, a foundation and a roof, wherein an upper section relative to the slab becomes a floor of upstairs while a lower section forms a ceiling of downstairs. Recently, in some cases, the lower section is actively exposed without alternative finishing of the ceiling. However, the ceiling structure is typically constructed by securing a duct space to accommodate different piping equipment or facilities, and then, combining a finishing panel with the lower section.

In such ceiling structure, a buried structure such as an insert is mounted in a mold before concrete casting to form a slab and, when the concrete is cured, fully threaded bolts are generally coupled to the exposed insert or, otherwise, a fixture is post-constructed on the cured concrete followed by coupling the fully threaded bolts thereto. The fully threaded bolts are coupled with a hanger to fix a carrying bar and, after providing the carrying bar on the hanger, a finishing support rail such as an M-bar or T-bar is coupled to the bottom of the carrying bar and a finishing panel is coupled to the finishing support rail, thereby completing the ceiling structure.

In general, the ceiling structure entails a disadvantage in that, when the hanger is coupled to the fully threaded bolts, adjusting a height of the hanger is limited to a predetermined width. In order to solve this problem, Korean Patent Laid-Open Publication No. 10-2006-0098567 (laid-open on Sep. 19, 2006; hereinafter referred to as “prior art document 1”) has disclosed a method of adjusting a height of a hanger by connecting a bent flat strip type hanger to the fully threaded bolts as shown in FIG. 1.

However, conventional ceiling structures including the invention of prior art document 1 have a problem of easy loosening of thread connection between the fully threaded bolts and the hanger due to vibration. Further, since the bent flat strip type hanger is commonly used, the hanger is curved and deformed by heavy load of the finishing panel or weight of a worker or encounters a problem of deviation (or escape) from its original position due to vibration.

Further, in order to fix the bent flat strip type hanger to an original position thereof, a number of clamping members, bolts and/or nuts are required, thus deteriorating workability. In case of a low height ceiling, the worker may optionally modify the hanger or cut the fully threaded bolt for construction in order to minimize a duct space on the top of a finishing panel, hence causing a safety problem.

Therefore, the present applicant has proposed a ceiling structure capable of flexibly adjusting a height of the ceiling structure during construction and ensuring durability, as described in Korean Patent No. 10-1574463 (registered on Nov. 27, 2015; hereinafter referred to as “prior art document 2”).

In prior art document 2, as shown in FIG. 2, a pair of fully threaded bolts is provided on upper and lower parts relative to a connector in order to enable height adjustment. However, due to a threaded coupling configuration simultaneously formed on the upper and lower parts, this structure is easily loosened. Further, relative rotation of the connector and the hanger is difficult, thus deteriorating workability. Further, since the pair of fully threaded bolts is provided on the upper and lower parts, a space above the ceiling is wasted and construction work cannot be performed in a tight space. Further, there is an additional problem of using many components and complicated working processes, causing reduction in workability.

Moreover, in case where there is no desirable facilities or equipment given on the ceiling or in case where construction of a simple finishing panel is required according to construction field requirements, need for an improved ceiling structure capable of being possibly and rapidly constructed has been proposed in the prior art.

SUMMARY Technical Problem

The present invention has been proposed to solve the above problems, and one object of the present invention is to provide a ceiling structure with increased workability and space utilization, characterized in that: a height of a carrying bar may be flexibly to allow efficient construction of the ceiling structure; vibration-caused rotation may be avoided to prevent release of the ceiling structure; the ceiling structure may freely and relatively rotate to thus achieve desirable workability; a space corresponding to at least the height of the carrying bar may be further obtained to efficiently utilize the space; and escape or movement of the carrying bar may be prevented.

Technical Solution

The ceiling structure C with increased workability and space utilization according to the present invention may include: a ceiling member SB; a fully threaded bolt 10, a top end of which is fixed to the ceiling member SB; a carrying bar fixture 20 coupled to a bottom end of the fully threaded bolt 10 in order to accommodate a carrying bar CB, wherein a height adjustable member 30 having screw threads 31 formed around an inner circumference of the height adjustable member is coupled to a lower part of the fully threaded bolt 10, and the carrying bar fixture 20 is coupled to the height adjustable member 30, thereby enabling adjustment of a relative height of the carrying bar fixture 20.

Further, the carrying bar fixture 20 may include at least one side wall 23 between a top flange 21 and a bottom flange 22, wherein a space S to receive the carrying bar CB is formed by the top and bottom flanges 21 and 22 as well as the side wall 23.

Further, the top flange 21 or the bottom flange 22 of the carrying bar fixture 20 may include a circular thru-hole 24 for the height adjustable member (abbreviated as “thru-hole”) as well as the height adjustable member 30 in a circular form passing through the thru-hole 24, wherein a shoulder flange 32 is formed around and engaged with an outer periphery of the height adjustable member 30 to allow rotation in relation to the carrying bar fixture 20, thereby adjusting the height.

Further, the bottom flange 22 may include a holding flange 22 a to accommodate the carry bar CB and a coupling flange 22 b for coupling the height adjustable member 30 relative to the side wall 23, wherein the coupling flange 22 b and the holding flange 22 a are placed at different relative heights such that the shoulder flange 32 of the height adjustable member 30 does not protrude from the bottom of the holding flange 22 a.

Further, an escape-preventing member is provided between an inner face of the side wall 23 of the carrying bar fixture 20 and an outer diameter of the shoulder flange 32, in order to prevent relative rotation of the carrying bar fixture 20 and the height adjustable member 30.

Further, a rotation-preventing member 40 may have an insert piece 42, which is integrally formed on the bottom of a ⊏-shaped guide piece 41 and covers a lateral face of the shoulder flange 32, thereby guiding the height adjustable member 30 into the carrying bar fixture 20, wherein the guide piece 41 is placed between the top flange 21 of the carrying bar fixture 20 and a top surface of the shoulder flange 32, and the insert piece 42 is placed between an inner face of the side wall 23 of the carrying bar fixture 20 and the lateral face of the shoulder flange 32.

Further, a clip piece 51 of the rotation-preventing member 50 may include a guide groove 51 a for inserting the top flange 21 or the bottom flange 22 of the carrying bar fixture 20, and a shoulder part 51 b and a rotation-preventing part 51 c which are formed above and under the guide groove, respectively, wherein the shoulder part 51 b is engaged with a top surface of the top flange 21 of the carrying bar fixture 20 while the rotation-preventing part 51 c is located between an inner face of the side wall 23 of the carrying bar fixture 20 and the lateral face of the shoulder flange 32.

Further, the shoulder flange 32 has a regular polygon form including a larger diameter part D1 and a smaller diameter part D2. Further, the insert piece 42 or the rotation-preventing part 51 c of the rotation-preventing member has a thickness t, wherein this thickness is larger than a difference between a distance‘s’ from the center of the shoulder flange 32 to the inner face of the side wall 20 and a length of the larger diameter part D1 but is smaller than a difference between the above distance ‘s’ and a length of the smaller diameter part D2.

Further, at least one side wall 23 formed in the carrying bar fixture 20 may have a shoulder side wall part 23 a with a height only sufficient to prevent escape of the carrying bar CB. In addition, the top flange 21 may have a slit 21 a, wherein a blocking piece 26 is removably inserted into the slit 21 a in order to shield an opening part OP on top of the shoulder side wall part 23 a.

Further, an elastic compression piece 60 is fitted between the fully threaded bolt 10 and the height adjustable member 30 so that rotation of the height adjustable member 30 is prevented by a pressure of the elastic compression piece 60.

In addition, the elastic compression piece 60 may include a curved insertion part 61 integrally formed at one side thereof.

Meanwhile, a construction method M of a ceiling structure with increased workability and space utilization may include: providing a height adjustable member 30 which passes through a thru-hole 24 for the height adjustable member formed on a carrying bar fixture 20 (S10); providing a carrying bar CB which passes through a plurality of carrying bar fixtures 20, wherein each of the carrying bar fixtures receives each of the height adjustable members 30 (S20); provisionally coupling the height adjustable member 30 to a lower part of a fully threaded bolt 10 pre-fixed to a ceiling member SB (S30); and finely adjusting the height adjustable member 30 to place the carrying bar fixture 20 in a normal position thereof (S40).

Advantageous Effects

The ceiling structure with increased workability and space utilization and its construction method according to the present invention have an advantage in that a height adjustable member is coupled to the lower part of a fully threaded bolt and a carrying bar fixture is coupled to the height adjustable member so as to adjust a relative height therebetween, thereby efficiently constructing the ceiling structure.

Further, the carrying bar fixture is coupled to the height adjustable member to allow relative rotation therebetween, thereby ensuring desirable workability according to construction field requirements. Further, an additional merit of flexibly adjusting an angle of the carrying bar may also be accomplished.

Moreover, the carrying bar fixture has at least one side wall between top and bottom flanges so as to stably secure the carrying bar and, therefore, may enable construction of a stable ceiling structure independent of heavy load of a finishing panel.

Additionally, since the height adjustable member passes through the top and bottom flanges of the carrying bar fixture, at least a space corresponding to a height of the carrying bar may be further provided to thus improve space utilization.

Further, a rotation-preventing member is provided on top of the top and bottom flanges, respectively, in order to avoid rotation, thereby preventing release of the coupling structure.

Alternatively, an elastic compression piece may be fitted between the fully threaded bolt and the height adjustable member to prevent rotation of the height adjustable member due to vibration.

Moreover, the carrying bar fixture may include a compression fixing member to prevent escape or movement of the carrying bar.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 and FIG. 2 are perspective views illustrating conventional ceiling structures;

FIG. 3 is a perspective view illustrating an overall shape of a functional ceiling coupling structure according to the present invention;

FIG. 4 is an exploded perspective view illustrating a coupling structure according to one embodiment of the present invention;

FIG. 5 is a combined perspective view illustrating the coupling structure according to the above embodiment of the present invention;

FIG. 6 is a schematic view illustrating adjustment of an angle and a height of the coupling structure according to the above embodiment of the present invention;

FIG. 7 is an exploded perspective view illustrating a coupling structure according to another embodiment of the present invention;

FIG. 8 is a combined perspective view illustrating the coupling structure according to the above embodiment of the present invention;

FIG. 9 is a perspective view illustrating different carrying bar fixtures according to other embodiments of the present invention;

FIG. 10 is a perspective view illustrating a joining process of a packing member according to one embodiment of the present invention;

FIG. 11a is an exploded perspective view illustrating a coupling structure provided with a rotation-preventing member according to one embodiment of the present invention;

FIG. 11b is cross-sectional views illustrating different coupling modes of the coupling structure shown in FIG. 11 a;

FIG. 12a is an exploded perspective view illustrating a coupling structure provided with a rotation-preventing member according to another embodiment of the present invention;

FIG. 12b is cross-sectional views illustrating different coupling modes of the coupling structure shown in FIG. 12 a;

FIG. 13a is a perspective view illustrating an insertion process of an elastic compression piece according to one embodiment of the present invention;

FIG. 13b is a horizontal cross-sectional view illustrating the insertion processes shown in (a) to (c) of FIG. 13 a;

FIG. 14 is a perspective view illustrating an insertion process of an elastic compression piece according to another embodiment of the present invention; and

FIG. 15 is a block diagram illustrating a construction method of the functional ceiling coupling structure according to the present invention.

DETAILED DESCRIPTION

Hereinafter, with reference to the accompanying drawings, the ceiling structure C with increased workability and space utilization and its construction method M according to the present invention will be more concretely described and illustrated.

FIG. 1 illustrates a ceiling structure according to the conventional art, while FIG. 2 illustrates a ceiling structure according to the prior application filed by the present applicant before the filing of the present application.

The ceiling structure according to the conventional art illustrated in FIG. 1 was manufactured by bending a sheet metal to fabricate a hanger and thread-coupling the same with fully threaded bolts. However, if a finishing panel has a heavy load, the hanger may be curved and deformed due to the load or escape from an original position thereof due to vibration.

Alternatively, the ceiling structure shown in FIG. 2 according to the prior application of the present applicant includes a pair of fully threaded bolts on upper and lower parts relative to a connector in order to adjust a height. However, the above bolts are easily loosened and relative rotation of the hanger is difficult, resulting in reduction in workability.

Most of all, conventional arts in relation to the ceiling structure have entailed a problem of wasting a space above the ceiling since a carrying bar is coupled to the bottom of a hanger or a pair of fully threaded bolts is provided via the connector.

Based on the above background, the ceiling structure C with increased workability and space utilization of the present invention has such a technical configuration that: a ceiling member SB is fixed on the top end of a fully threaded bolt 10; a carrying bar fixture 20 is coupled to the bottom end of the fully threaded bolt 10 in order to accommodate a carrying bar CB; and a height adjustable member 30 is coupled between the fully threaded bolt 10 and the carrying bar fixture 20, as shown in FIG. 3.

As shown in FIGS. 4 and 5, the height adjustable member 30 has screw threads 31 formed around an inner circumference thereof to be threaded on a lower part of the fully threaded bolt 10. Accordingly, controlling relative coupling extent between the fully threaded bolt 10 and the height adjustable member 30 may adjust a relative height of the carrying bar fixture 20 coupled to the height adjustable member 30.

As such, as shown in FIG. 6(b), it is possible to adjust a height of the carrying bar fixture 20 based on the height adjustable member 30 according to construction field requirements. Therefore, a height of the whole ceiling structure C may be flexibly controlled and workability may also be achieved.

Alternatively, the height adjustable member 30 may be fabricated to have screw threads 31 formed on only an upper part of the inner circumference while being omitted on a lower part thereof, so as to decrease fatigue caused by operation of height adjustment.

Meanwhile, as shown in FIG. 6(a), the carrying bar fixture 20 may be fabricated to relatively rotate about the height adjustable member 30, thereby achieving efficient height adjustment using the height adjustable member 30. Further, based on arrangement or direction of a finishing panel coupled to the ceiling structure C, an angle of the carrying bar fixture 20 may be optionally adjustable. Based on this operation, overall arrangement and direction of the finishing panel may be flexibly regulated by controlling directions of the carrying bar CB and a finishing support rail coupled to the bottom of the carrying bar.

According to one embodiment, as shown in FIG. 4, the top flange 21 or bottom flange 22 to configure the carrying bar fixture 20 may have a circular thru-hole 24 for the height adjustable member as well as the height adjustable member 30 in a circular form passing through the thru-hole 24.

Herein, a shoulder flange 32 may be formed around an outer periphery of the height adjustable member 30 and engaged with the carrying bar fixture 20 to relatively rotate about the carrying bar fixture 20. As a result, even when the top flange 21 or the bottom flange 22 is engaged with the shoulder flange 32 of the height adjustable member 30 through the thru-hole 24, the carrying bar fixture 20 may flexibly rotate about the height adjustable member 30.

Meanwhile, as shown in FIGS. 4 and 7, the carrying bar fixture 20 has at least one side wall 23 integrally formed between the top flange 21 and the bottom flange 22 to prepare a space S, which is formed by the top and bottom flanges 21 and 22 as well as the side wall 23, thereby accommodating the carrying bar CB.

Accordingly, as shown in FIG. 8, the carrying bar CB may be stably supported by the top and bottom flanges 21 and 22 as well as the side wall 23 of the carrying bar fixture 20.

The carrying bar fixture 20 may be fabricated with a variety of shapes based on arrangement and number of the top and bottom flanges 21 and 22 as well as the side wall 23. According to one embodiment, two side walls 23 may be provided between both ends of the top flange 21 and the bottom flange 22, respectively, to form a rectangular cross-section. According to another embodiment, a single side wall 23 may be provided at only one end to form a ⊏-shaped cross-section. Herein, since a thru-hole 24 is formed in the top and bottom flanges 21 and 22 and the height adjustable member 30 is provided to penetrate the top and bottom flanges 21 and 22 through the thru-hole, a space corresponding to a length of the height adjustable member 30 may further be obtained, thereby achieving efficient space utilization.

Further, the carrying bar CB is provided at one side to the side wall 23 while the thru-hole 24 is formed on the top and bottom flanges 21 and 22 at the other side and, therefore, the height adjustable member 30 may penetrate these top and bottom flanges 21 and 22.

Herein, as shown in FIG. 7, the bottom flange 22 may include a holding flange 22 a to accommodate the carry bar CB and a coupling flange 22 b for coupling the height adjustable member 30, wherein the coupling flange 22 b and the holding flange 22 a are placed at different relative heights relative to the side wall 23.

The relative heights of the holding flange 22 a and the coupling flange 22 b are different from each other in order to correspond to a height of the shoulder flange 32 present on the bottom of the height adjustable member 30, thereby achieving improved space utilization. Further, since the shoulder flange 32 does not protrude from the bottom of the holding flange 22 a, it is possible to prevent interference of the height adjustable member 30 when a finishing support rail or the like is coupled to the bottom of the carrying bar, thereby increasing workability.

Further, as shown in FIG. 9(b), a shoulder side wall 23 a may be formed on an end of the holding flange 22 a at a desired height not to escape the carrying bar CB. As a result, the carrying bar CB may be more easily accommodated and stably fixed to the carrying bar fixture.

In this regard, as shown in FIG. 10, a slit 21 a may be formed on the top flange 21 and a blocking piece 26 may be removably inserted into the slit 21 a in order to shield an opening part OP present on top of the shoulder side wall 23 a.

In other words, the blocking piece 26 may be optionally inserted into or removed from the slit 21 a to shield or open the opening part OP, and to stably secure the carrying bar CB in its normal position while ensuring workability in seating the carrying bar CB in the position, simultaneously. The blocking piece 26 may include a shoulder piece 26 a integrally formed in the blocking piece 26 so that the blocking piece 26 is engaged in the top flange 21 while being inserted in the slit 21 a.

Further, as shown in FIGS. 11a and (b) of FIG. 11b , the shoulder flange 32 of the height adjustable member 30 may have a plurality of pin holes 32 a, while the top flange 21 or the bottom flange 22 engaged in the shoulder flange 32 may also have a plurality of pin holes 21 c and 22 c at sites corresponding to the above pin holes 32 a.

As such, in order to pass through the pin holes 21 c and 22 c of the top flange 21 or the bottom flange 22, as well as the pin holes 32 a of the shoulder flange 32, an alignment pin P may be inserted into these pin holes to accomplish more stable prevention of rotation. Further, if the alignment pin P is made of a metal material, more robust construction may be attempted by bending an end of the alignment pin after passing the same through the above pin holes.

Meanwhile, as shown in FIG. 11a to FIG. 12b , the ceiling structure C of the present invention may include a rotation-preventing member between the carrying bar fixture 20 and the height adjustable member 30 to prevent relative rotation of the carrying bar fixture 20 and the height adjustable member 30.

More particularly, the shoulder flange 32 of the height adjustable member 30 has a regular polygon form, and a rotation-preventing member is provided between an inner face of a side wall 23 of the carrying bar fixture 20 and an outer diameter of the shoulder flange 32 in order to prevent relative rotation of the carrying bar fixture 20 and the height adjustable member 30.

The rotation-preventing member 40 according to one embodiment may have an insert piece 42, which is integrally formed on the bottom of a ⊏-shaped guide piece 41 and covers a lateral face of the shoulder flange 32, thereby guiding the height adjustable member 30 into the carrying bar fixture 20, wherein the guide piece 41 is placed between the top flange 21 of the carrying bar fixture 20 and a top surface of the shoulder flange 32, and the insert piece 42 is placed between an inner face of the side wall 23 of the carrying bar fixture 20 and the lateral face of the shoulder flange 32.

In this regard, the shoulder flange 32 has a regular polygon form including a larger diameter part D1 and a smaller diameter part D2. Further, the insert piece 42 of the rotation-preventing member has a thickness t, wherein this thickness may be larger than a difference between a distance ‘s’ from the center of the shoulder flange 32 to the inner face of the side wall 23 and a length of the larger diameter part D1 but smaller than a difference between the above distance ‘s’ and a length of the smaller diameter part D2.

As such, due to the thickness t of the insert piece 42 of the rotation-preventing member 40, a space required for rotating the shoulder flange 32 is not given, thereby preventing release of the ceiling structure caused by relative rotation of the carrying bar fixture 20 and the height adjustable member 30.

Further, the insert piece 42 integrally formed on the bottom of the guide piece 41 of the rotation-preventing member 40 may be provided in only a pair of opposite sides facing the side wall 23. Alternatively, the insert piece may be formed in all of three sides to easily fit the rotation-preventing member 40 in the carrying bar fixture 20 during construction.

Moreover, an extension 41 a may be formed by extending one end of the guide piece 41. After inserting the guide piece 41 between the carrying bar fixture 20 and the shoulder flange 32 of the height adjustable member 30, the extension 41 a may be bent downward to prevent separation and escape of the guide piece in the reverse direction in advance.

Alternatively, instead of the rotation-preventing member 40 shown in (a) of FIG. 11b , an alignment pin P shown in (b) of FIG. 11b may also be used to obtain fixation force.

A rotation-preventing member 50 according to another embodiment will be described. As shown in FIG. 12a and FIG. 12b , a clip piece 51 of the rotation-preventing member 50 may include a guide groove 51 a for inserting the top flange 21 of the carrying bar fixture 20, and a shoulder part 51 b and a rotation-preventing part 51 c which are formed above and under the guide groove, respectively.

In this regard, the shoulder part 51 b is engaged with a top surface of the top flange 21 of the carrying bar fixture 20 while the rotation-preventing part 51 c is located between an inner face of the side wall 23 of the carrying bar fixture 20 and the lateral face of the shoulder flange 32.

Herein, the shoulder flange 32 may have a regular polygon form including a larger diameter part D1 and a smaller diameter part D2. Further, a thickness ‘t’ of the rotation-preventing part 51 c of the rotation-preventing member 50 may be larger than a difference between a distance ‘s’ from the center of the shoulder flange 32 to the inner face of the side wall 20 and a length of the larger diameter part D1 but is smaller than a difference between the above distance ‘s’ and a length of the smaller diameter part D2. As a result, no space for rotating the shoulder flange 32 is given due to the thickness t of the rotation-preventing part 51 c, thereby preventing release of the ceiling structure due to relative rotation of the carrying bar fixture 20 and the height adjustable member 30.

Further, a push-piece 52 is bent and formed at the other side of the rotation-preventing member 50, and the rotation-preventing member 50 may be easily inserted by only gently pushing the push-piece 52. Accordingly, the push-piece 52 is preferably formed to be perpendicular to a whole length direction of the clip piece 51.

Meanwhile, as shown in (b) of FIG. 12b , higher fixation force may be obtained using the alignment pin P as well as the rotation-preventing member 50, simultaneously.

FIG. 13a and FIG. 13b are a perspective view and a cross-sectional view illustrating an insertion process of an elastic compression piece 60, respectively. As shown in these figures, the elastic compression piece 60 is fitted between the fully threaded bolt 10 and the height adjustable member 30 through an open hole 33, so as to prevent rotation of the height adjustable member 30 by a pressure of the elastic compression piece 60.

The elastic compression piece 60 may be inserted through a part of the inner circumference of the height adjustable member 30 having the open hole 33, wherein the part does not have screw threads 31. The elastic compression piece 60 may be modified into a round form corresponding to a shape between the fully threaded bolt 10 and the inner circumference of the height adjustable member 30, and pressure may be naturally applied due to the modification of the elastic compression piece 60, so as to prevent rotation of the height adjustable member 30.

Herein, on the inner circumference of the height adjustable member 30 into which the elastic compression piece 60 is inserted, a shoulder 34 may be formed to smoothly insert the elastic compression piece 60 in a horizontal direction. The shoulder 34 may have a height corresponding to a width of the elastic compression piece 60 along the inner circumference of the height adjustable member 30.

Further, an insertion part 61 may be integrally formed at one side of the elastic compression piece 60, wherein the insertion part is curved to be easily fitted, thereby enabling the elastic compression piece 60 to be easily fitted during insertion. In addition, stable pressure may be obtained based on the curved shape during fit coupling.

Further, a push-piece 62 may be bent and formed at the other side of the elastic compression piece 60. The elastic compression piece 60 may be easily inserted by only gently pushing the push-piece 62. Accordingly, the push-piece 62 is preferably formed to be perpendicular to a whole length direction of the elastic compression piece 60.

Moreover, in order to secure desired friction to the fully threaded bolt 10 or the inner circumference of the height adjustable member 30, a friction part 63 may be formed on at least one face of the elastic compression piece 60. The friction part 63 may be formed using a friction formable material or may have unevenness in order to apply additional friction resistance against separation/escape caused by the pressure, thereby preventing relative rotation of the height adjustable member 30.

Further, as shown in FIG. 14, an insert hole 35 may be formed on top of the height adjustable member 30 to insert the elastic compression piece 60 therein, wherein the elastic compression piece 60 is fitted in the insert hole 35 to thus prevent rotation of the height adjustable member 30 by a pressure of the elastic compression piece 60.

The curved insertion part 61 of the elastic compression piece 60 may function to secure stable pressure when being fitted in the insert hole 35, while the push-piece 62 allows easy insertion of the elastic compression piece 60 by only gently pressing down the push-piece 62.

Meanwhile, plural carrying bar fixtures 20 are provided and pass through the carrying bar CB. In order to prevent the carrying bar fixture 20 from slipping and escaping from the carrying bar CB, a pressure fixture 25 may be provided on the side wall 23 of the carrying bar fixture 20.

The pressure fixture 25 may have a protrusion 25 a or a friction pad 25 b to prevent the carrying bar fixture 20 from escaping the carrying bar CB, thereby being secured on the carrying bar CB. Further, when the carrying bar fixture 20 is fabricated to have a rectangular cross-section, the carrying bar fixture 20 may have a configuration such that it is fitted on the carrying bar CB by the shoulder flange 32 of the height adjustable member 30 engaged in the thru-hole 24 formed on the top flange 21.

A construction method M of forming a ceiling structure C with increased workability and space utilization according to the present invention may include providing a height adjustable member S10, providing a carrying bar S20, provisionally coupling these components S30, and finely adjusting the same S40, as shown in the block diagram of FIG. 15.

The provision of a height adjustable member S10 may include: providing the height adjustable member 30 to pass through a thru-hole 24 for the height adjustable member (‘thru-hole’) formed on a carrying bar fixture 20. As described above, the carrying bar fixture 20 may be fabricated in a plurality of shapes depending upon arrangement and/or number of top and bottom flanges 21 and 22 as well as a side wall 23. In this regard, the thru-hole 24 is formed on the top and bottom flanges 21 and 22.

Accordingly, the height adjustable member 30 may be arranged to pass through the thru-hole 24 formed on the top flange 21 or the bottom flange 22, wherein a shoulder flange 32 of the height adjustable member 30 is coupled to be engaged with the top and bottom flanges 21 and 22.

After the provision of the height adjustable member S10, a step of providing a carrying bar by fixing the carrying bar CB in the carrying bar fixture 20 (S20) may be included. The provision of the carrying bar S20 may include fixing the carrying bar CB in the carrying bar fixture 20 in order to combine a finishing support rail with the carrying bar CB.

In general, a single carrying bar CB is fixed by a plurality of carrying bar fixtures 20. Therefore, the carrying bar CB may pass through the plurality of carrying bar fixtures 20 provided with height adjustable members 30.

A provisional coupling step of the above components S30 may include temporarily coupling the height adjustable member 30 combined with the carrying bar fixture 20 on a lower part of fully threaded bolts 10 previously fixed on the ceiling member SB.

On an inner face of the height adjustable member 30, screw threads 31 are formed to be threaded with the fully threaded bolts 10. Herein, considering combination of a final panel, it is difficult to define a correct location in a vertical direction. Therefore, the height adjustable member 30 may be temporarily maintained in a provisional coupling state.

After the provisional coupling step S30, a fine adjustment step S40 is conducted. This step may include adjusting the height adjustable member 30 to place the carrying bar fixture 20 in a normal position thereof.

Meanwhile, after the fine adjustment step S40, a further step of fixing the carrying bar fixture S50 may be included in order to prevent rotation and release of the height adjustable member 30, wherein a rotation-preventing member is seated between the inner face of a side wall 23 of the carrying bar fixture 20 and a lateral face of the shoulder flange 32 to prevent rotation of the carrying bar fixture 20.

The rotation-preventing member 40 according to one embodiment may have an insert piece 42, which is integrally formed on the bottom of a ⊏-shaped guide piece 41 and covers the lateral face of the shoulder flange 32, thereby guiding the height adjustable member 30 into the carrying bar fixture 20. According to another embodiment, the rotation-preventing member 50 may include a clip piece 51, wherein a guide groove 51 a for inserting the top flange 21 of the carrying bar fixture 20 is present, and a shoulder part 51 b and a rotation-preventing part 51 c are formed above and under the guide groove 51 a, respectively.

A detailed description of such different rotation-preventing members according to various embodiments will be omitted.

Further, in order to prevent rotation and release of the height adjustable member 30, in place of the carrying bar fixture fixing step S50, a height adjustable member fixing step S60 may be adopted, wherein an elastic compression piece 60 is fitted between the fully threaded bolt 10 and the height adjustable member 30 to prevent rotation of the height adjustable member 30 by a pressure of the elastic compression piece 60.

In this case, on the inner circumference of the height adjustable member 30, a shoulder 34 may be formed to insert the elastic compression piece 60 in a horizontal direction or, otherwise, an insert hole 35 may be formed to insert the elastic compression piece 60 from top to bottom in a vertical direction, thereby easily fitting the elastic compression piece 60. Further, a curved insertion part 61 for easy insertion and a push-piece 62 are integrally bent and formed at one side and the other side of the elastic compression piece 60, respectively, thereby enabling the elastic compression piece 60 to be easily inserted during insertion.

Of course, both of the carrying bar fixture fixing step S50 and the height adjustable member fixing step S60 may be executed.

As described above, it would be understood that the ceiling structure C with increased workability and space utilization, as well as its construction method M, may be modified into other specific forms by a person having ordinary skill in the art, without changing the technical spirit and/or fundamental features of the present invention.

Therefore, it would be understood that the embodiments described above are proposed as illustrative examples only, a scope of the present invention may be embodied by the appended claims below rather than the above detailed description, and all alterations and/or modifications deduced from the meanings and range of the claims and equivalent concepts thereof are duly construed to be within the scope of the present invention.

DESCRIPTION OF SYMBOLS

-   -   C . . . Ceiling structure     -   CB . . . Carrying bar     -   10 . . . Fully threaded bolt     -   20 . . . Carrying bar fixture     -   21 . . . Top flange     -   22 . . . Bottom flange     -   22 a . . . Holding flange     -   22 b . . . Coupling flange     -   23 . . . Side wall     -   24 . . . Thru-hole for height adjustable member     -   25 . . . Pressure fixture     -   25 a . . . Protrusion     -   25 b . . . Friction pad     -   30 . . . Height adjustable member     -   31 . . . Screw thread     -   32 . . . Shoulder flange     -   33 . . . Open hole     -   34 . . . Shoulder     -   35 . . . Insert hole     -   40, 50 . . . Rotation-preventing member     -   41 . . . Guide piece     -   41 a . . . Extension     -   42 . . . Insert piece     -   51 . . . Clip piece     -   51 a . . . Guide groove     -   51 b . . . Shoulder part     -   51 c . . . Rotation-preventing part     -   52 . . . Push-piece     -   60 . . . Elastic compression piece     -   61 . . . Insertion part     -   62 . . . Push-piece     -   63 . . . Friction part     -   P . . . Alignment pin     -   M . . . Ceiling structure construction process     -   S10 . . . Providing Height adjustable member     -   S20 . . . Providing carrying bar     -   S30 . . . Provisional coupling     -   S40 . . . Fine adjustment     -   S50 . . . Fixing carrying bar fixture     -   S60 . . . Fixing height adjustable member 

1. A ceiling structure with increased workability and space utilization, comprising: a ceiling member; a fully threaded bolt, a top end of which is fixed to the ceiling member; and a carrying bar fixture coupled to a bottom end of the fully threaded bolt in order to accommodate a carrying bar, wherein: a height adjustable member having screw threads formed around an inner circumference of the height adjustable member is coupled to a lower part of the fully threaded bolt, and the carrying bar fixture is coupled to the height adjustable member, thereby enabling adjustment of a relative height of the carrying bar fixture.
 2. The ceiling structure according to claim 1, wherein the carrying bar fixture includes at least one side wall between a top flange and a bottom flange to form a space for receiving the carrying bar by the top and bottom flanges and as well as the side wall.
 3. The ceiling structure according to claim 2, wherein: the top flange or the bottom flange of the carrying bar fixture includes a circular thru-hole for the height adjustable member and for the height adjustable member in a circular form passing through the thru-hole, and a shoulder flange is formed and engaged around an outer periphery of the height adjustable member to allow rotation in relation to the carrying bar fixture, thereby adjusting the height.
 4. The ceiling structure according to claim 3, wherein: the bottom flange includes a holding flange to accommodate the carry bar and a coupling flange for coupling the height adjustable member about the side wall, and the coupling flange and the holding flange are placed at different relative heights such that the shoulder flange of the height adjustable member (30) does not protrude from the bottom of the holding flange.
 5. The ceiling structure according to claim 3, wherein an escape-preventing member is provided between an inner face of the side wall of the carrying bar fixture and an outer diameter of the shoulder flange, so as to prevent relative rotation of the carrying bar fixture and the height adjustable member.
 6. The ceiling structure according to claim 5, further comprising a rotation-preventing member having an insert piece which is integrally formed on the bottom of a ⊏-shaped guide piece and covers a lateral face of the shoulder flange, thereby guiding the height adjustable member into the carrying bar fixture, wherein: the guide piece is placed between the top flange of the carrying bar fixture and a top surface of the shoulder flange, and the insert piece is placed between an inner face of the side wall of the carrying bar fixture and the lateral face of the shoulder flange.
 7. The ceiling structure according to claim 6, wherein: the shoulder flange has a regular polygon form including a larger diameter part and a smaller diameter part, and a thickness of the insert piece or the rotation-preventing part of the rotation-preventing member is larger than a difference between a distance from the center of the shoulder flange to the inner face of the side wall and a length of the larger diameter part but is smaller than a difference between the above distance and a length of the smaller diameter part.
 8. The ceiling structure according to claim 5, further comprising a rotation-preventing member having a clip piece that includes: a guide groove for inserting the top flange or the bottom flange of the carrying bar fixture; and a shoulder part and a rotation-preventing part, which are formed above and under the guide groove, respectively, wherein: the shoulder part is engaged on a top surface of the top flange of the carrying bar fixture, and the rotation-preventing part is placed between the inner face of the side wall of the carrying bar fixture and the lateral face of the shoulder flange.
 9. The ceiling structure according to claim 8, wherein: the shoulder flange has a regular polygon form including a larger diameter part and a smaller diameter part, and a thickness of the insert piece or the rotation-preventing part of the rotation-preventing member is larger than a difference between a distance from the center of the shoulder flange to the inner face of the side wall and a length of the larger diameter part but is smaller than a difference between the above distance and a length of the smaller diameter part.
 10. The ceiling structure according to claim 2, wherein: any one side wall formed in the carrying bar fixture has a shoulder side wall part with only a height sufficient to prevent escape of the carrying bar, and the top flange has a slit so that a blocking piece is removably inserted into the slit in order to shield an opening part on top of the shoulder side wall part.
 11. The ceiling structure according to claim 1, further comprising an elastic compression piece fitted between the fully threaded bolt and the height adjustable member, so that rotation of the height adjustable member is prevented by a pressure of the elastic compression piece.
 12. The ceiling structure according to claim 11, wherein the elastic compression piece has a curved insertion part integrally formed at one side thereof.
 13. A construction method of a ceiling structure with increased workability and space utilization, comprising: providing a height adjustable member which passes through a thru-hole for the height adjustable member formed on a carrying bar fixture; providing a carrying bar which passes through a plurality of carrying bar fixtures, wherein each of the carrying bar fixtures receives each of the height adjustable members; provisionally coupling the height adjustable member to a lower part of a fully threaded bolt pre-fixed to a ceiling member; and finely adjusting the height adjustable member to place the carrying bar fixture in a normal position thereof. 